La vallée de la mort ("Death Valley") is a simulation of this epic siege that ended the French colonial presence in Asia and marked the beginning of a 21 year struggle for national unification. The game is designed for 2 players, one taking the role of the French commander of the fortress complex at Dien Bien Phu, the other of General Giap, commanding the Viet Minh forces laying siege. The game and scenarios are small enough to be played solitaire, however.

Each turn of the game represents one week. Each assault impulse represents one day. A point of combat strength represents 150 to 200 men, 6 aircraft, 5 or 6 guns, or a single tank. An inch on the map corresponds to 700 yards.